This heatform was used in a mansion i bought thats build to look like a french country home. Hands down these fireplaces where the best and heaviest ever made. The ladie that owned are home searched high and low to find one she found one brand new and paid a pretty penny for it. The home was built in 1991 the heat this put off with a power vent is astronomical it heats the 5400 sq ft home pretty well. I cannot belive the heavy steel they used back then if you have on do not ever ever get rid of it for some new modern thing guaged metal that a fireplace salesman talked you into. Id repair this if ever needed it truly is a piece of history.